Hydroxylating pot type hydrocarbon burner



atented Sept. 30, 1947 OFFICE HYDROXYLATING POT-TYPE HYDRO- CARBON BURNER James L. Breese, Santa Fe, N. Mex., assignor, by mesne assignments, to Brcese Burners, Inc., Santa Fe, N. Mex., a corporation of Delaware Application November 15, 1943, Serial No. 510,302

My invention relates to an improvement in pot type burners and has for one purpose to provide improved means for delivering air to a liquid hydrocarbon burner. Another purpose is to provide .improved means for supplying 'secondary'air to the mixture-of vaporized hydrocarbon andprimary air, ina hydroxylating; pot type burner. Another purpose is to obtain silent combustion. Other purposes-will appear from time to time in the course of the specification.

This invention is illustrated more or less diagrammatically .in the accompanying drawings, wherein:

Figure 1 is a vertical axial section of an embodiment of my invention? Figure 2 is a partial section on the line 22 of Figure 1; and

Figure 3 is a partial vertical section on an enlarged scale of a variant form of the invention.

Like parts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, i generally indicates an outer housing having a plurality of feet 2 between which are air inflow spaces 3. The housing is partly closed by a horizontal partition t centrally apertured as at 5. -8 is an angle ring which receives the upper outwardly extending flange 8 of a burner pct l. 9 indicates an upper portion of the housing I, which serves as a combustion chamber, or a heat radiating member. Any suitable draft means, not herein shown, may be provided for disposing of the heated gases and by-products of combustion. One end of the pot is partially closed by a centrally apertured flame ring In. The pot is shown as having the other end closed as at I I and a generally cylindrical side wall l2 provided with a plurality of primary air inlet apertures l3, circumferentially spaced about the wall l 2 and located at various distances from the closed end of the pot. Located beyond the primary air inlet apertures l3 nearest the closed end is a centrally apertured pilot baflle ring it supported on any suitable pins or supports l5. A liquid fuel is supplied to the pot along the pipe E6, the rate of flow being controlled by any suitable control means generally indicated as at ll. I illustrate, for example, a known type of float valve assembly with a, manual control knob 18 for controlling the flow of'fuel along the pipe it. However, it will be understood that any suit able control means, manual or automatic, may

be provided for varying the rate of flow of l quid fuel along the pipe It or for maintaining a uniform rate of flow, when a uniform rate is desired, it will be understood that whereas I have shown 3 Claims. ((ll. 15891) a vertically axised pot, the pot may be horizontally axised or the axis may be variously inclined in relation to the vertical.

It will be understood that in pot type burners of the present type, a liquid hydrocarbon is vaporized by the heat of combustion taking place in or above the pot. The liquid hydrocarbon is admitted to the interior of the pot and is initially partially vaporized by the heat of hydroxylation taking place in the pot. As the liquid hydrocarbon is vaporized in the pot it rises and is surrounded by a film of secondary air. The radiant heat from this ensuing final combustion supplies the remainder 'of the additional heat necessary to vaporize all of the liquid hydrocarbon. There is a differentiation in action between the so-called primary air and the so-called secondary air admitted to the interior of the pot. With reference to the present structure, the air entering through the primary apertures l3, has a different action than the air entering through the secondary apertures 23 and 24. All of the oxygen in the air entering through the primary apertures I3 is fully consumed in the process of hydroxylation.

The oxygen in the air entering through the secondary apertures 23 and 24 is only partially consumed, but all of the vaporized hydrocarbons surrounded by the secondary air are entirely consumed.

When the pot is burning at the high fire stage, combustion takes place at or near the top of the pot and the flame flows through the central aperture of the flame ring to and into the combustion chamber 9. The present structure provides a, particularly. efilcient means for supplying the secondary air and for providing a silent and efiiclent combustion. I employ, for example, an outward circumferential offset or enlargement of the pot, adjacent to the open end of the pot. In the particular embodiment herein shown I illustrate the oflset as being V-shaped in vertical, radial cross section, the enlargement having an upper wall it and a lower wall 2| converging and meeting outwardly as at 22. In each wall I illustrate a row of secondary air inlet apertures Hand 25.

The apertures are preferably arranged in pairs as shown, in such fashion that the jets delivered by the apertures will impinge upon each other at a short distance inwardly from the pot wall.

In the form of Figure 3 I omit the apertures 23 from the wall 20 and use the generally vertical apertures 24 in wall 2| t'o impinge Jets against the wall 20.

It will be realized that whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my drawings and description to be taken as in a broad sense illustrative or diagrammatic, rather than as a limitation to my precise showing.

The use and operation of the invention are as follows:

In pot type liquid hydrocarbon burners it is highly important to provide an adequate supply of secondary air to a primary mixture in such a fashion that combustion noises are substantially prevented. It is important that the secondary air be provided in such quantities and at such location that the final mixturewill burn steadily clear back to the wall of the pot, at the point of admission of the secondary air supply. In the present structure the secondary air is supplied in impinging jets which engage at a short distance inwardly from the wall of the pot and which provide an ample supply ofse'condary air at the point of admission. In practice, the form of Figure 1, with its impinging jets, provides quiet and eflicient combustion, with an ample supply'of air at the base of the jets. The impingement 6f the two rows of inclined jets holds down the speed of flow of the flame and prevents any tendency for the flame to burn away from the inner face of the pot. Thus I obtain the advantage of the admission of the air at a relatively low rate and of the provision of an ample supply of air at the base of the secondary lets.

A primary cause of. noisy combustion is the tendency of the flame to leave the immediate vicinity of the orifice throughwhich the air enters. By providing impinging jets I control or limit the speed of the air Jet flow, and at the same time insure an ample supply of secondary air at the base of the jets, adjacent the inner face of the pot wall. I

In Figure 3 I employ the wall 20 as a surface against which the Jets from the apertures 2i impinge. The result is an inward now of secondary air at a relatively low rate of travel, which prevents the flame from burning away from the inner face of the pot wall.

I claim: r V g 1. In a burner pot for pot type burners, a not member having an open end, a generally cylindrical circumferential side wall, having primary air inlet apertures therein, and a closed end wall, said not member, adjacent its open end, having a circumferential outward expansion, and means for delivering a liquid fuel to the interior of the pot member. said outward expansion including an upper wall portion and slower wall portion,

each of said wall portions having a circumferentially extending row of secondary air inlets, the axes of said inlets converging inwardly, the inlets of said upper and lower wall portions being arranged in corresponding pairs with the axes of each pair intersecting, I

2. In a burner pot for pot type burners, a pot member having an open end, a generally cylindrical circumferential side wall having primary air inlet apertures therein, and 'a closed end well, said pot member, adjacent its open end, having a circumferential outward expansion, and means for delivering liquid fuel to the interior of the pot member, said outward expansion including outwardly converging wall portions continuous with the circumferential side wall, each of said wall portions having a circumferentially extending row of secondary air inlets, the axes of said inlets converging inwardly, the inlets of said outwardly converging wall portions being arranged in corresponding pairs with the axes of each sai pair intersecting.

3. In a burner pot for not type burners, a pot member having an open end, a generally cylindrical circumferential side wall having primary air inlet apertures therein, and a closed end wall, said pot member, adjacent its open end, having a circumferential outward expansion, and means for delivering liquid fuel to the interior of the pot member, said outward expansion including outwardly converging wall portions continuous with the clrcumferentialside wall, each of said wall portions having a circumferentially extending row of secondary air inlets, the axes of said inlets converging inwardly, the inlets of said outwardly converging wall portions being arranged with the axes of the inlets of one wall portion converging with the axes or the inlets of the opposite wall portion.

JAMES L. BREESE.

REFERENCES CITED The following references are of record in the file of this patent: 

